Re: [Bug 1926044] Re: QEMU-user doesn't report HWCAP2_MTE

[Vitaly Buka]

Thanks for the quick fix!

On Tue, Apr 27, 2021 at 2:55 PM Richard Henderson <
1926044@bugs.launchpad.net> wrote:

>
> 20210427214108.88503-1-richard.henderson@linaro.org/">https://patchew.org/QEMU/20210427214108.88503-1-richard.henderson@linaro.org/
>
> This has missed 6.0, but should be acceptable to roll into 6.0.1.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1926044
>
> Title:
>   QEMU-user doesn't report HWCAP2_MTE
>
> Status in QEMU:
>   In Progress
>
> Bug description:
>   Reproducible on ffa090bc56e73e287a63261e70ac02c0970be61a
>
>   Host Debian 5.10.24 x86_64 GNU
>
>   Configured with "configure --disable-system --enable-linux-user
>   --static"
>
>   This one works and prints "OK" as expected:
>   clang tests/tcg/aarch64/mte-3.c -target aarch64-linux-gnu
> -fsanitize=memtag -march=armv8+memtag
>   qemu-aarch64 --cpu max -L /usr/aarch64-linux-gnu ./a.out && echo OK
>
>
>   This one fails and print "0":
>   cat mytest.c
>   #include <stdio.h>
>   #include <sys/auxv.h>
>
>   #ifndef HWCAP2_MTE
>   #define HWCAP2_MTE (1 << 18)
>   #endif
>
>   int main(int ac, char **av)
>   {
>       printf("%d\n", (int)(getauxval(AT_HWCAP2) & HWCAP2_MTE));
>   }
>
>
>   clang mytest.c -target aarch64-linux-gnu  -fsanitize=memtag
> -march=armv8+memtag
>   qemu-aarch64 --cpu max -L /usr/aarch64-linux-gnu ./a.out
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/qemu/+bug/1926044/+subscriptions
>

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https://bugs.launchpad.net/bugs/1926044

Title:
  QEMU-user doesn't report HWCAP2_MTE

Status in QEMU:
  In Progress

Bug description:
  Reproducible on ffa090bc56e73e287a63261e70ac02c0970be61a

  Host Debian 5.10.24 x86_64 GNU

  Configured with "configure --disable-system --enable-linux-user
  --static"

  This one works and prints "OK" as expected:
  clang tests/tcg/aarch64/mte-3.c -target aarch64-linux-gnu  -fsanitize=memtag 
-march=armv8+memtag
  qemu-aarch64 --cpu max -L /usr/aarch64-linux-gnu ./a.out && echo OK

  
  This one fails and print "0":
  cat mytest.c
  #include <stdio.h>
  #include <sys/auxv.h>

  #ifndef HWCAP2_MTE
  #define HWCAP2_MTE (1 << 18)
  #endif

  int main(int ac, char **av)
  {
      printf("%d\n", (int)(getauxval(AT_HWCAP2) & HWCAP2_MTE));
  }

  
  clang mytest.c -target aarch64-linux-gnu  -fsanitize=memtag 
-march=armv8+memtag
  qemu-aarch64 --cpu max -L /usr/aarch64-linux-gnu ./a.out

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